* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 20px 0;
    background: #ffd700;
    border-radius: 10px;
    margin-bottom: 20px;
}

.time {
    color: #666;
    font-size: 0.9em;
    margin-top: 10px;
}

.price-box {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    text-align: center;
}

.price {
    font-size: 1.5em;
    color: #666;
}

.number {
    font-size: 2.5em;
    font-weight: bold;
    color: #e53935;
    margin: 10px 0;
}

.chart-container {
    height: 200px;
    margin: 20px 0;
}

footer {
    text-align: center;
    color: #999;
    font-size: 0.8em;
    padding: 15px 0;
}